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Acquisition and Divestiture - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2020
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Business Acquisition [Line Items]          
Purchases of businesses, net of cash acquired       $ 116,509 $ 122,149
Gain (loss) on disposition of business       141,020 $ 0
2020 Consolidated Acquisition          
Business Acquisition [Line Items]          
Purchases of businesses, net of cash acquired $ 116,500        
Total other intangible assets acquired $ 59,500 $ 59,500   59,500  
Finite-lived intangible assets acquired   50,500      
Future amortization expense, year one   3,000   3,000  
Future amortization expense, year two   3,000   3,000  
Future amortization expense, year three   3,000   3,000  
Future amortization expense, year four   3,000   3,000  
Future amortization expense, year five   3,000   $ 3,000  
2020 Consolidated Acquisition | Trade Names          
Business Acquisition [Line Items]          
Indefinite-lived intangible trade names acquired   9,000      
2020 Consolidated Acquisition | Customer Relationship          
Business Acquisition [Line Items]          
Finite-lived intangible assets acquired   $ 38,000      
Amortization period for finite-lived intangible asset   20 years      
2020 Consolidated Acquisition | Purchased Technology          
Business Acquisition [Line Items]          
Finite-lived intangible assets acquired   $ 12,500      
Amortization period for finite-lived intangible asset       15 years  
Kymera International          
Business Acquisition [Line Items]          
Business combination, consideration transferred     $ 245,300    
Income tax expense relating to sale of business     31,400    
Kymera International | Other Income          
Business Acquisition [Line Items]          
Gain (loss) on disposition of business     $ 141,000